The more I look at Old Hemp the more I think it's actually Boots' ancestor.
First following sheep at the age of six weeks, Hemp grew to have a great ability to herd. He moved sheep quietly unlike the louder sheepdogs of the era and was far more mild-mannered, although sometimes worked so intensely that he physically trembled; within a few generations, his style had been adopted by almost all Border Collies, and became known as the Border Collie style.